Netstat is a tool for collecting Information regarding network connections. It provides a simple view of TCP and UDP connections, and their state and network traffic statistics. Which of the following commands shows you the TCP and UDP network connections, listening ports, and the identifiers?

Netstat is a tool for collecting Information regarding network connections. It provides a simple view of TCP and UDP connections, and their state and network traffic statistics. Which of the following commands shows you the TCP and UDP network connections, listening ports, and the identifiers?

• A. netstat -ano
• B. netstat -b
• C. netstat -r
• D. netstat -s

Answer: (A)

To identify which program owns each network connection, you need a netstat view that shows all active TCP and UDP entries, includes the ports, and reveals the process identifiers. The combination of three flags achieves this: -a lists all connections and listening ports, -n presents addresses and ports in numeric form, and -o displays the owning process ID for each connection. Together, netstat -ano yields TCP and UDP connections, listening ports, and the process identifiers, giving you a complete link between activity and the responsible process. Other options don’t meet all three aspects. The option that shows the executable involved can help identify the program name, but it doesn’t reliably provide the numeric process ID in the same view and may require elevated privileges. The option for the routing table focuses on routes, not active connections. The option for per-protocol statistics reports counts and error statistics, not the actual connections or their owners.

To identify which program owns each network connection, you need a netstat view that shows all active TCP and UDP entries, includes the ports, and reveals the process identifiers. The combination of three flags achieves this: -a lists all connections and listening ports, -n presents addresses and ports in numeric form, and -o displays the owning process ID for each connection. Together, netstat -ano yields TCP and UDP connections, listening ports, and the process identifiers, giving you a complete link between activity and the responsible process.

Other options don’t meet all three aspects. The option that shows the executable involved can help identify the program name, but it doesn’t reliably provide the numeric process ID in the same view and may require elevated privileges. The option for the routing table focuses on routes, not active connections. The option for per-protocol statistics reports counts and error statistics, not the actual connections or their owners.